The water impact on the aging of power transformer oil

Şerban, Mariana; Helerea, Elena; Munteanu, Adrian

doi:10.1109/icate.2014.6972644

Cited by 4 publications

(1 citation statement)

References 13 publications

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“…This O-H functional group decrease can be attributed to the reduction of molecular weight [3]. The reduction of O-H functional groups is due to the hydrolysis reaction of cellulose, which generates glucose and oxidation reactions during aging which generate CO2 and H2O [34]. Figure 14 shows the correlation between DP and the intensity of peak absorbance of the O-H functional group at wavenumber 3325 cm −1 and 3273 cm −1 of insulating paper.…”

Section: O-h C-h C=o C-omentioning

confidence: 98%

Study on the Effects of Thermal Aging on Insulating Paper for High Voltage Transformer Composite with Natural Ester from Palm Oil Using Fourier Transform Infrared Spectroscopy (FTIR) and Energy Dispersive X-ray Spectroscopy (EDS)

Munajad

Subroto

Suwarno³

2017

Energies

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Abstract:Mineral oil is widely used as liquid insulation in high voltage equipment. Due to environmental considerations, recently natural esters have been considered as naturally friendly liquid insulation candidates for high voltage transformers. In this experiment, transformer insulation paper was subjected to get accelerated aging test with copper strip in natural ester in a hermeneutical heat-resistant glass bottle at temperatures of 120 • C and 150 • C for 336 h, 672 h and 1008 h. The experimental results of Fourier transform infrared spectroscopy (FTIR) showed that the intensity of the absorbance peak of the O-H functional group decreased with aging, while the intensity of the C-H and C=O functional group absorbance peaks have increased with aging and the intensity of the C-O functional group absorbance peak has a tendency to increase with aging. The energy dispersive X-ray spectroscopy (EDS) experimental results showed that the weight percent of the element C increased with aging and the weight percent of the element O has decreased with aging. The experimental results show a good correlation between the degree of polymerization (DP) and the weight percent of O element. This indicates that EDS may be used as a new method for estimating the DP of transformer insulation paper.

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Section: O-h C-h C=o C-omentioning

confidence: 98%